Quote:
Originally Posted by DJ N
Hi Marc,
Nothing changed whatsoever. Same gain and offset, same capture program. Comparing the histograms, the one from last night is a lot more "to the left". Not sure how I can copy an image of the histogram.....
Has me a little perplexed. Would not have thought it to be the filter.  |
It's a lot more to the left because your sky count was lower (no moon). The only other thing to look for would be calibration. You did flat fielding on the second set, not on the first one though. Maybe you killed your data and dynamic range by dimming the center (inverse vignetting). Have you tried to stretch the data on uncalibrated subs see if you get he same level of details as the old data set?